package com.dbgs.cpic.jfw.utils.union;

import com.dbgs.cpic.data.security.Base64;

import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class SM4Utils {
//	private String secretKey = "";
//    private String iv = "";
//    private boolean hexString = false;

    public String secretKey = "JeF8U9wHFOMfs2Y8";
    private String iv = "";
    public boolean hexString = false;

    public SM4Utils()
    {
    }
//
//    public byte encryptData_ECB1(byte[] inputStream){
//        try
//        {
//            SM4_Context ctx = new SM4_Context();
//            ctx.isPadding = true;
//            ctx.mode = SM4.SM4_ENCRYPT;
//
//            byte[] keyBytes;
//            if (hexString)
//            {
//                keyBytes = Util.hexStringToBytes(secretKey);
//            }
//            else
//            {
//                keyBytes = secretKey.getBytes();
//            }
//
//            SM4 sm4 = new SM4();
//            sm4.sm4_setkey_enc(ctx, keyBytes);
//            String cipherText = new BASE64Encoder().encode(inputStream);
//            if (cipherText != null && cipherText.trim().length() > 0)
//            {
//                Pattern p = Pattern.compile("\\s*|\t|\r|\n");
//                Matcher m = p.matcher(cipherText);
//                cipherText = m.replaceAll("");
//            }
//            return cipherText;
//        }
//        catch (Exception e)
//        {
//            e.printStackTrace();
//            return (Byte) null;
//        }
//    }

    public String encryptData_ECB(String plainText)
    {
        try
        {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_ENCRYPT;

            byte[] keyBytes;
            if (hexString)
            {
                keyBytes = Util.hexStringToBytes(secretKey);
            }
            else
            {
                keyBytes = secretKey.getBytes();
            }

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_ecb(ctx, plainText.getBytes("UTF-8"));
            String cipherText =  Base64.encode(encrypted);
            if (cipherText != null && cipherText.trim().length() > 0)
            {
                Pattern p = Pattern.compile("\\s*|\t|\r|\n");
                Matcher m = p.matcher(cipherText);
                cipherText = m.replaceAll("");
            }
            return cipherText;
        }
        catch (Exception e)
        {
            return null;
        }
    }

    public String decryptData_ECB(String cipherText)
    {
        try
        {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_DECRYPT;

            byte[] keyBytes;
            if (hexString)
            {
                keyBytes = Util.hexStringToBytes(secretKey);
            }
            else
            {
                keyBytes = secretKey.getBytes();
            }

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_ecb(ctx, Base64.decode(cipherText));
            return new String(decrypted, "UTF-8");
        }
        catch (Exception e)
        {
            return null;
        }
    }

    public String encryptData_CBC(String plainText)
    {
        try
        {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_ENCRYPT;

            byte[] keyBytes;
            byte[] ivBytes;
            if (hexString)
            {
                keyBytes = Util.hexStringToBytes(secretKey);
                ivBytes = Util.hexStringToBytes(iv);
            }
            else
            {
                keyBytes = secretKey.getBytes();
                ivBytes = iv.getBytes();
            }

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_enc(ctx, keyBytes);
            byte[] encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, plainText.getBytes("UTF-8"));
            String cipherText = Base64.encode(encrypted);
            if (cipherText != null && cipherText.trim().length() > 0)
            {
                Pattern p = Pattern.compile("\\s*|\t|\r|\n");
                Matcher m = p.matcher(cipherText);
                cipherText = m.replaceAll("");
            }
            return cipherText;
        }
        catch (Exception e)
        {
            return null;
        }
    }

    public String decryptData_CBC(String cipherText)
    {
        try
        {
            SM4_Context ctx = new SM4_Context();
            ctx.isPadding = true;
            ctx.mode = SM4.SM4_DECRYPT;

            byte[] keyBytes;
            byte[] ivBytes;
            if (hexString)
            {
                keyBytes = Util.hexStringToBytes(secretKey);
                ivBytes = Util.hexStringToBytes(iv);
            }
            else
            {
                keyBytes = secretKey.getBytes();
                ivBytes = iv.getBytes();
            }

            SM4 sm4 = new SM4();
            sm4.sm4_setkey_dec(ctx, keyBytes);
            byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, Base64.decode(cipherText));
            return new String(decrypted, "UTF-8");
        }
        catch (Exception e)
        {
            return null;
        }
    }
//
    public static void main(String[] args) throws IOException
    {
        String plainText = "太享福12345.*--=·~。*!@#$%^&*()_+<>?;':\"";

        SM4Utils sm4 = new SM4Utils();
//        sm4.secretKey = "JeF8U9wHFOMfs2Y8";
//        sm4.hexString = false;

//        System.out.println("ECB模式加密");
//        String cipherText = sm4.encryptData_ECB("A1234567");
//        System.out.println("密文: " + cipherText);
//        System.out.println("");

        plainText = sm4.decryptData_ECB("6pzpDLR6OlQ6hpqXQqMuYw==");
        System.out.println("明文: " + plainText);
//        System.out.println("");
//
//        System.out.println("CBC模式加密");
//        sm4.iv = "UISwD9fW6cFh9SNS";
//        cipherText = sm4.encryptData_CBC(plainText);
//        System.out.println("密文: " + cipherText);
//        System.out.println("");
//
//        plainText = sm4.decryptData_CBC(cipherText);
//        System.out.println("明文: " + plainText);

    }
}
